Checking your domain’s DKIM, SPF and spam record status for outgoing SMTP mail
You need to make sure that your SPF record includes your server, and relay server. For example: TXT: “v=spf1 a mx a:smtp.transip.nl include:_spf.google.com ip4:11.22.33.44 ~all” This: – accepts the server mentioned in the A record – accepts the server men...